The shampoo contains caffeine that travels directly into the hair follicles to promote hair growth. Fine, weakened hair becomes stronger and easier to style. Leave on for 2 minutes to allow for full penetration. If left on for longer, the caffeine continues to work into the scalp, leaving you with a more intense treatment. – N.P.

The shampoo contains caffeine that travels directly into the hair follicles to promote hair growth. Fine, weakened hair becomes stronger and easier to style. Leave on for 2 minutes to allow for full penetration. If left on for longer, the caffeine continues to work into the scalp, leaving you with a more intense treatment. – N.P.